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Finding the Fourth Proportional to 8,607.92, 12,915.32 and 3,930.13

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Solution

The fourth proportional to 8,607.92, 12,915.32 and 3,930.13 is: 5,896.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,607.92 : 12,915.32 = 3,930.13 : x
  2. Step 2: Convert to fraction form
    8,607.92/12,915.32 = 3,930.13/x
  3. Step 3: Cross multiply
    8,607.92x = 12,915.32 × 3,930.13
  4. Step 4: Simplify right side
    8,607.92x = 50,758,883.09
  5. Step 5: Solve for x
    x = 50,758,883.09/8,607.92
  6. Step 6: Final answer
    x = 5,896.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.